From owner-freebsd-stable@FreeBSD.ORG Tue Mar 10 00:24:43 2015 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 96991782 for ; Tue, 10 Mar 2015 00:24:43 +0000 (UTC) Received: from mail.akips.com (mail.akips.com [65.19.130.19]) by mx1.freebsd.org (Postfix) with ESMTP id 82EFEABC for ; Tue, 10 Mar 2015 00:24:42 +0000 (UTC) Received: from [10.1.8.7] (CPE-120-146-191-2.static.qld.bigpond.net.au [120.146.191.2]) by mail.akips.com (Postfix) with ESMTPSA id 460C3284E1 for ; Tue, 10 Mar 2015 10:17:10 +1000 (EST) Message-ID: <54FE3803.2000307@akips.com> Date: Tue, 10 Mar 2015 10:17:07 +1000 From: Nick Frampton User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 MIME-Version: 1.0 To: freebsd-stable@freebsd.org Subject: Suspected libkvm infinite loop Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,URIBL_BLOCKED autolearn=disabled version=3.4.0 X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on host1.akips.com X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Mar 2015 00:24:43 -0000 Hi, For the past several months, we have had an intermittent problem where a process calling kvm_openfiles(3) or kvm_getprocs(3) (not sure which) gets stuck in an infinite loop and goes to 100% cpu. We have just observed "fstat -m" do the same thing and suspect it may be the same problem. Our environment is a 10.1-RELEASE-p6 amd64 guest running in VirtualBox, with ufs root and zfs /home. Has anyone else experienced this? Is there anything we can do to investigate the problem further? Thanks, Nick -- Founder, CTO www.akips.com